From: Lazaridis Ilias Date: 2011-07-17T09:17:43+09:00 Subject: [ruby-core:38115] [Ruby 1.9 - Feature #4893] Literal Instantiation breaks Object Model Issue #4893 has been updated by Lazaridis Ilias. Magnus Holm wrote: > YARV already has flags to see if methods are redefined (used for fast > numeric operations). Maybe you could use them? See > vm_init_redefined_flag(void) in vm.c. This sounds plausible. But due to the many delays, I've not much energy/focusation left for this issue, and thus I avoid to change the taken path. But I'll take for sure a look later. ---------------------------------------- Feature #4893: Literal Instantiation breaks Object Model http://redmine.ruby-lang.org/issues/4893 Author: Lazaridis Ilias Status: Assigned Priority: Low Assignee: Yukihiro Matsumoto Category: Target version: #String2.rb class String def initialize(val) self.replace(val) puts object_id end def my_method_test 'has method ' end end # command line $ irb irb(main):001:0> original = String.new("original") => "original" irb(main):002:0> load "String2.rb" => true irb(main):003:0> altered = String.new("altered") 21878604 => "altered" irb(main):004:0> altered.my_method_test => "has method " irb(main):005:0> literal = "literal" => "literal" irb(main):006:0> literal.my_method_test => "has method " irb(main):007:0> - The initialize method is an integral part of the class String. From the moment that "String2.rb" is loaded, the initialize method of class String has been validly redefined. (The behaviour of the String class within the "irb session" is altered) The altered initialize method is now an integral part of the class String. The altered String object behaves as expected (responds to "my_method_test, initialized via redefined initialize method). The String(Literal) object responds to "my_method_test", but it is was not initialized with the redefined initialize method. - The "Literal Instantiation" calls the original (core-C-level) String initialize method instead of the redefined one (user-language-level). This *breaks* the object model. -- http://redmine.ruby-lang.org